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Article: Observations of the circumstellar water 110 → 110 and ammonia 110 → 00 lines in IRC +10216 by the Odin satellite

TitleObservations of the circumstellar water 110 → 110 and ammonia 110 → 00 lines in IRC +10216 by the Odin satellite
Authors
KeywordsCircumstellar Matter
Molecular Processes
Stars: Agb And Post-Agb
Stars: Individual (Cw Leo)
Issue Date2006
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 2006, v. 637 n. 2, p. 791-797 How to Cite?
AbstractSubmillimeter lines of H 2O and NH 3 have been detected in the carbon star IRC +10216 (CW Leo) with the Odin submillimeter satellite. The detection of the J K-, K+ = 1 10 → 1 10 557 GHz line of ortho-H 2O confirms the earlier detection in the same source with SWAS. The detection of the J K = 1 0 rarr; 0 0 572 GHz line represents the first observation of the ground-state rotational transition of NH 3 in a stellar envelope. By fitting a molecular line transfer model to the observed lines, we derive an ortho-H 20 abundance of 2.4 × 10 -6, which is consistent with estimates from the SWAS observation. The derived ortho-NH 3 abundance of 1 × 10 -6 relative to H 2 is significantly higher than those derived from 24 GHz inversion transitions and is slightly higher than those from vibrational transitions in the infrared band. The high H 2O and NH 3 abundances in the carbon-rich star IRC+10216 underscore shortcomings in the conventional gas-phase LTE and non-LTE chemical models. © 2006. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/179694
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHasegawa, TIen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorKoning, Nen_US
dc.contributor.authorVolk, Ken_US
dc.contributor.authorJusttanont, Ken_US
dc.contributor.authorOlofsson, Hen_US
dc.contributor.authorSchöier, FLen_US
dc.contributor.authorSandqvist, AAen_US
dc.contributor.authorHjalmarson, Åen_US
dc.contributor.authorOlberg, Men_US
dc.contributor.authorWinnberg, Aen_US
dc.contributor.authorNyman, LÅen_US
dc.contributor.authorFrisk, Uen_US
dc.date.accessioned2012-12-19T10:02:53Z-
dc.date.available2012-12-19T10:02:53Z-
dc.date.issued2006en_US
dc.identifier.citationThe Astrophysical Journal, 2006, v. 637 n. 2, p. 791-797en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179694-
dc.description.abstractSubmillimeter lines of H 2O and NH 3 have been detected in the carbon star IRC +10216 (CW Leo) with the Odin submillimeter satellite. The detection of the J K-, K+ = 1 10 → 1 10 557 GHz line of ortho-H 2O confirms the earlier detection in the same source with SWAS. The detection of the J K = 1 0 rarr; 0 0 572 GHz line represents the first observation of the ground-state rotational transition of NH 3 in a stellar envelope. By fitting a molecular line transfer model to the observed lines, we derive an ortho-H 20 abundance of 2.4 × 10 -6, which is consistent with estimates from the SWAS observation. The derived ortho-NH 3 abundance of 1 × 10 -6 relative to H 2 is significantly higher than those derived from 24 GHz inversion transitions and is slightly higher than those from vibrational transitions in the infrared band. The high H 2O and NH 3 abundances in the carbon-rich star IRC+10216 underscore shortcomings in the conventional gas-phase LTE and non-LTE chemical models. © 2006. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637Xen_US
dc.relation.ispartofThe Astrophysical Journalen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCircumstellar Matteren_US
dc.subjectMolecular Processesen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Individual (Cw Leo)en_US
dc.titleObservations of the circumstellar water 110 → 110 and ammonia 110 → 00 lines in IRC +10216 by the Odin satelliteen_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1086/498561en_US
dc.identifier.scopuseid_2-s2.0-32944474539en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-32944474539&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume637en_US
dc.identifier.issue2en_US
dc.identifier.spage791en_US
dc.identifier.epage797en_US
dc.identifier.isiWOS:000235131600022-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHasegawa, TI=7404173711en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridKoning, N=15520613500en_US
dc.identifier.scopusauthoridVolk, K=7006571965en_US
dc.identifier.scopusauthoridJusttanont, K=6701597318en_US
dc.identifier.scopusauthoridOlofsson, H=7004294995en_US
dc.identifier.scopusauthoridSchöier, FL=6603684180en_US
dc.identifier.scopusauthoridSandqvist, AA=35451841800en_US
dc.identifier.scopusauthoridHjalmarson, Å=15744175200en_US
dc.identifier.scopusauthoridOlberg, M=16201342800en_US
dc.identifier.scopusauthoridWinnberg, A=6603734778en_US
dc.identifier.scopusauthoridNyman, LÅ=7006064444en_US
dc.identifier.scopusauthoridFrisk, U=8966521600en_US
dc.identifier.citeulike6389672-

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